Siemens SIRIUS 3RH2911 auxiliary switches: snap onto the front or side of 3RT2 contactors and 3RH2 contactor relays to provide additional NO/NC contacts.
Technical data
| Series | 3RH2911 |
|---|---|
| Product type | Auxiliary switch (instantaneous) |
| Suitable for | 3RT2 contactors (S00–S3), 3RH2 contactor relays |
| Mounting | Front or lateral |
| Contacts | 1 to 4-pole, NO/NC combinations |
| Connection | Screw or spring-loaded terminals |
Article numbers
| Version | Contacts | Connection | Article No. |
|---|---|---|---|
| Front mounting | 2 NO + 2 NC | Screw | 3RH2911-1HA22 |
| Front mounting | 2 NO + 2 NC | Spring-loaded | 3RH2911-2HA22 |
| Front mounting | 1 NC | Screw | 3RH2911-1HA01 |
| Front mounting | 1 NC | Spring-loaded | 3RH2911-2HA01 |
| Front mounting | 2 NC | Screw | 3RH2911-1HA02 |
| Front mounting | 2 NC | Spring-loaded | 3RH2911-2HA02 |
| Front mounting | 3 NC | Screw | 3RH2911-1HA03 |
| Front mounting | 3 NC | Spring-loaded | 3RH2911-2HA03 |
| Front mounting | 1 NO | Screw | 3RH2911-1HA10 |
| Front mounting | 1 NO | Spring-loaded | 3RH2911-2HA10 |
| Front mounting | 1 NO + 1 NC | Screw | 3RH2911-1HA11 |
| Front mounting | 1 NO + 1 NC | Spring-loaded | 3RH2911-2HA11 |
| Front mounting | 1 NO + 2 NC | Screw | 3RH2911-1HA12 |
| Front mounting | 1 NO + 2 NC | Spring-loaded | 3RH2911-2HA12 |
| Front mounting | 1 NO + 3 NC | Screw | 3RH2911-1HA13 |
| Front mounting | 1 NO + 3 NC | Spring-loaded | 3RH2911-2HA13 |
| Front mounting | 2 NO | Screw | 3RH2911-1HA20 |
| Front mounting | 2 NO | Spring-loaded | 3RH2911-2HA20 |
| Front mounting | 2 NO + 1 NC | Screw | 3RH2911-1HA21 |
| Front mounting | 2 NO + 1 NC | Spring-loaded | 3RH2911-2HA21 |
| Front mounting | 3 NO | Screw | 3RH2911-1HA30 |
| Front mounting | 3 NO | Spring-loaded | 3RH2911-2HA30 |
| Front mounting | 3 NO + 1 NC | Screw | 3RH2911-1HA31 |
| Front mounting | 3 NO + 1 NC | Spring-loaded | 3RH2911-2HA31 |
| Front mounting, with leading and lagging contacts | 2 NO + 2 NC | Screw | 3RH2911-1FC22 |
| Front mounting, with leading and lagging contacts | 2 NO + 2 NC | Spring-loaded | 3RH2911-2FC22 |
| Lateral mounting, cable entry from top | 1 NC | Screw | 3RH2911-1AA01 |
| Lateral mounting, cable entry from bottom | 1 NC | Screw | 3RH2911-1BA01 |
| Lateral mounting, cable entry from top | 1 NO + 1 NC | Screw | 3RH2911-1LA11 |
| Lateral mounting, cable entry from bottom | 1 NO + 1 NC | Screw | 3RH2911-1MA11 |
| Front mounting, 4-pole | 4 NO | Screw | 3RH2911-1FA40 |
| Front mounting, 4-pole | 4 NO | Spring-loaded | 3RH2911-2FA40 |
| Front mounting, 4-pole | 2 NO + 2 NC | Screw | 3RH2911-1FA22 |
| Front mounting, 4-pole | 2 NO + 2 NC | Spring-loaded | 3RH2911-2FA22 |
| Front mounting, 4-pole | 4 NC | Screw | 3RH2911-1FA04 |
| Front mounting, 4-pole | 4 NC | Spring-loaded | 3RH2911-2FA04 |
| Front mounting, with leading and lagging contacts | 1 NO + 1 NC | Screw | 3RH2911-1FB11 |
| Front mounting, with leading and lagging contacts | 1 NO + 1 NC | Spring-loaded | 3RH2911-2FB11 |
| Front mounting, with leading and lagging contacts | 2 NO + 2 NC | Screw | 3RH2911-1FB22 |
| Front mounting, with leading and lagging contacts | 2 NO + 2 NC | Spring-loaded | 3RH2911-2FB22 |
| Lateral mounting, cable entry from top | 1 NO | Screw | 3RH2911-1AA10 |
| Lateral mounting, cable entry from bottom | 1 NO | Screw | 3RH2911-1BA10 |
| Lateral mounting, cable entry from top | 2 NO | Screw | 3RH2911-1LA20 |
| Lateral mounting, cable entry from bottom | 2 NO | Screw | 3RH2911-1MA20 |
| Front mounting, block for 8-contact contactor relays (S00) | 2 NO + 2 NC | Screw | 3RH2911-1GA22 |
| Front mounting, block for 8-contact contactor relays (S00) | 2 NO + 2 NC | Spring-loaded | 3RH2911-2GA22 |
| Front mounting, block for 8-contact contactor relays (S00) | 4 NO | Screw | 3RH2911-1GA40 |
| Front mounting, block for 8-contact contactor relays (S00) | 4 NO | Spring-loaded | 3RH2911-2GA40 |
| Front mounting, block for 8-contact contactor relays (S00) | 3 NO + 1 NC | Screw | 3RH2911-1GA31 |
| Front mounting, block for 8-contact contactor relays (S00) | 3 NO + 1 NC | Spring-loaded | 3RH2911-2GA31 |
| Front mounting, block for 8-contact contactor relays (S00) | 1 NO + 3 NC | Screw | 3RH2911-1GA13 |
| Front mounting, block for 8-contact contactor relays (S00) | 1 NO + 3 NC | Spring-loaded | 3RH2911-2GA13 |
| Front mounting, block for 8-contact contactor relays (S00) | 4 NC | Screw | 3RH2911-1GA04 |
| Front mounting, block for 8-contact contactor relays (S00) | 4 NC | Spring-loaded | 3RH2911-2GA04 |
| Front mounting, force-guided with 3RH2 contactor relays | 2 NO + 2 NC | Screw | 3RH2911-1XA22-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 2 NO + 2 NC | Spring-loaded | 3RH2911-2XA22-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 4 NO | Screw | 3RH2911-1XA40-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 4 NO | Spring-loaded | 3RH2911-2XA40-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 3 NO + 1 NC | Screw | 3RH2911-1XA31-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 3 NO + 1 NC | Spring-loaded | 3RH2911-2XA31-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 4 NC | Screw | 3RH2911-1XA04-0MA0 |
| Front mounting, force-guided with 3RH2 contactor relays | 4 NC | Spring-loaded | 3RH2911-2XA04-0MA0 |
Technical data and article numbers are based on Siemens catalog IC 10 · 2026 (chapter 3, contactor accessories) and are for information only. Image is representative.
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Tags: 3RH2911 auxiliary switch, siemens auxiliary contact, 3RH2911, auxiliary switch block, 3RH2911-1HA22, 3RH2911-2HA22, 3RH2911-1HA01, 3RH2911-2HA01, 3RH2911-1HA02, 3RH2911-2HA02, 3RH2911-1HA03, 3RH2911-2HA03, 3RH2911-1HA10, 3RH2911-2HA10, 3RH2911-1HA11, 3RH2911-2HA11, 3RH2911-1HA12, 3RH2911-2HA12, 3RH2911-1HA13, 3RH2911-2HA13, 3RH2911-1HA20, 3RH2911-2HA20, 3RH2911-1HA21, 3RH2911-2HA21, 3RH2911-1HA30, 3RH2911-2HA30, 3RH2911-1HA31, 3RH2911-2HA31, 3RH2911-1FC22, 3RH2911-2FC22, 3RH2911-1AA01, 3RH2911-1BA01, 3RH2911-1LA11, 3RH2911-1MA11, 3RH2911-1FA40, 3RH2911-2FA40, 3RH2911-1FA22, 3RH2911-2FA22, 3RH2911-1FA04, 3RH2911-2FA04, 3RH2911-1FB11, 3RH2911-2FB11, 3RH2911-1FB22, 3RH2911-2FB22, 3RH2911-1AA10, 3RH2911-1BA10, 3RH2911-1LA20, 3RH2911-1MA20, 3RH2911-1GA22, 3RH2911-2GA22, 3RH2911-1GA40, 3RH2911-2GA40, 3RH2911-1GA31, 3RH2911-2GA31, 3RH2911-1GA13, 3RH2911-2GA13, 3RH2911-1GA04, 3RH2911-2GA04, 3RH2911-1XA22-0MA0, 3RH2911-2XA22-0MA0, 3RH2911-1XA40-0MA0, 3RH2911-2XA40-0MA0, 3RH2911-1XA31-0MA0, 3RH2911-2XA31-0MA0, 3RH2911-1XA04-0MA0, 3RH2911-2XA04-0MA0